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Power Electronics - Engineering

Q1:

A 3 phase induction motor is fed by a 3 phase ac regulator to change the stator voltage. The variation in speed will be more if

A load torque is constant

B load torque increases with increase in speed

C load torque decreases with increase in speed

D either (a) or (b)

ANS:B - load torque increases with increase in speed

If load torque is constant, the change in speed is very small.